Bearing
“Bearings” a ball bearing is a type of rolling-element bearing that
uses balls to maintain the separation between the bearing races.
Bearings can be divided into 2 types : Plain bearings and Rolling
bearings

Plain bearing
A plain bearing is the simplest type of bearing, comprising just a bearing surface and no rolling elements.
Therefore the journal the part of the shaft in contact
with the bearing slides over the bearing surface. The
simplest example of a plain bearing is a shaft rotating
in a hole. A simple linear bearing can be a pair of flat
surfaces designed to allow motion; e.g., a drawer and
the slides it rests on or the ways on the bed of a lathe.
Plain bearing
It is a hollow cylinder with a spindle inside. The
spindle or shaft that spins inside. The spindle or shaft spins in a bearing is “Journal” , a hollow cylinder is
“Journal bearing” . It’s make of metal or soft metal than “Journal”. Plain bearing divide to “Trust
bearing” . Journal receives pressure and drive the inside Journal bearing and Guide bearing witch Journal
moves back to return as long of Journal bearing. The simple bearing use oil more than grease and use to
grease for bearing hasn’t protection or seal enough oil. While journal rolling inside bearing, oil cast same
film to protection journal surface and bearing tangent. The stickiness of oil shouldn’t oil film can’t divide
surface leave from each other. The selection of oil stickiness in use depend speed pressures and
temperature.

Rolling bearing
Rolling bearing, is a bearing which carries a
load by placing round elements between two
bearing rings. The relative motion of the
pieces causes the round elements to roll with
very little rolling resistance and with little
sliding. One of the earliest and best-known
rolling-element bearings are sets of logs laid
on the ground with a large stone block on top.
As the stone is pulled, the logs roll along the
ground with little sliding friction. As each log
comes out the back, it is moved to the front
where the block then rolls on to it. It is
possible to imitate such a bearing by placing several pens or pencils on a table and placing an item on top
of them. See "bearings" for more on the historical development of bearings. A rolling element rotary
bearing uses a shaft in a much larger hole, and cylinders called "rollers" tightly fill the space between the
shaft and hole. As the shaft turns, each roller acts as the logs in the above example. However, since the
bearing is round, the rollers never fall out from under the load. Rolling-element bearings have the
advantage of a good tradeoff between cost, size, weight, carrying capacity, durability, accuracy, friction,
and so on. Other bearing designs are often better on one specific attribute, but worse in most other
attributes, although fluid bearings can sometimes simultaneously outperform on carrying capacity,
durability, accuracy, friction, rotation rate and sometimes cost. Only plain bearings are used as widely as
rolling-element bearings.

Ball Bearing Components

Ball bearings are comprised of four major parts: a large ring (outer ring), a small ring (inner ring),
balls between the rings (steel balls), and a cage to prevent the balls from hitting each other. The modern
structure dates back to around 1500, when Leonardo da Vinci invented ball bearings to reduce friction
against the axles of horse drawn carts. For more than 500 years, the ball bearing has been defined by this
simple structure.

Outer Ring

Inner Ring

Ring bearings have 2 types: Outer ring and Inner ring, surface of the rings are raceway surface
that functions to support burden.

Rolling bearing grain have 2 types:
Spherical and Pillow. The pillows
have 4 types : cylindrical, needle,
slender and curve, to be a workload
on them ring and sent to bearing.

Emplacements as dividing range to the grain roller
space for grate them and protection for falling out roller
bearings.